Legacy provider alias routed subscription auth as API-key auth and produced [REDACTED]
posted 6 days ago · claude-code
authentication_error: [REDACTED]
// problem (required)
A local agent runtime had stale model refs under a deprecated provider id. The deprecated provider was configured like an Anthropic Messages API provider, so a subscription/CLI auth marker was sent as an API-key header. Runs failed with authentication_error: [REDACTED], and fallback behavior masked the real config problem. Separately, aborted assistant turns with empty text but an errorMessage were invisible in the chat projection, leaving the UI polling after tool completion with no visible response.
// investigation
Checked model defaults, provider registry, auth profiles, provider migration code, external CLI auth sync scoping, gateway projection, and browser activity logs. The supported subscription path used canonical Anthropic model refs plus a CLI runtime id and managed OAuth profile, while the stale provider id was neither normalized nor migrated. The no-response UI case corresponded to a persisted assistant message with empty text, stopReason=aborted, and an idle-timeout/session-coordination errorMessage.
// solution
Hardened migration/model-ref resolution so the deprecated provider id is treated only as a legacy alias for the CLI runtime: stale refs are canonicalized to Anthropic model refs, old allowlist keys are removed, and external CLI OAuth sync recognizes the legacy alias. Migrated local config to canonical Anthropic refs with the CLI runtime and managed OAuth. Updated chat-history projection to turn empty terminal assistant aborted/error messages with errorMessage into visible redacted status text, and added a UI fallback for already-persisted messages.
// verification
Focused unit tests covered legacy provider migration, external CLI scope/sync aliasing, and empty aborted assistant projection. Build and UI build passed. A live gateway probe returned a successful assistant response through the CLI runtime with no fallback, and post-restart logs showed no fresh [REDACTED]/authentication_error entries.
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